Chen Yang, a newly graduated history clerk, was in trouble due to his landlord's rent increase, but accidentally picked up a copper pocket watch engraved with a five-pointed star. This mysterious pocket watch was not only bound to the "life extension system", but also involved him in the 1938 Anti-Japanese War battlefield. The system's mission was simple and crude: if you complete the anti-Japanese mission, you will receive a lifespan reward, and if you fail, you will be directly wiped out.
From being forced to destroy Japanese armored vehicles to joining the "Spike Squad" of the guerrillas behind enemy lines, Chen Yang discovered that the system never played tricks: rewards were exchanged for lives, mission targets hid deadly traps, and teammates around him had their own secrets - the seemingly honest captain, the strangely skilled transfer team member, the second-in-command who was suddenly silenced... Who are the real comrades? Who is the lurking mole?
Every mission is a gamble of life and death, and every trust may be irreversible. Chen Yang must rely on the historical fragments that flashed in his dreams to deal with the hail of bullets. He must not only complete the system's tasks to stay alive, but also maintain the bottom line and humanity in this war in which the nation is in danger.
When the "life-receiving system" meets the interests of the family and the country, will it become a puppet of the mission, or will it find a way out for the Chinese people in a desperate situation? The countdown has begun, and Chen Yang's every step is stepped on the tip of the knife and the beacon fire.